Impedance modelling of air electrodes in alkaline media

Electrochemical Impedance Spectroscopy and its Applications

“…This method was also applied by other authors to hydrogen absorption in a porous electrode consisting of spherical particles of AB 5 -type material [458] to describe a whole polymer electrolyte fuel cell with gas diffusion in pores [459], alkaline fuel cells [460], and intercalation electrodes [461]. Several authors attempted to fit the experimental impedances to their models [456][457][458][459][460][461].…”

“…Several authors attempted to fit the experimental impedances to their models [456][457][458][459][460][461].…”

Influence of Temperature on the Performance of Gas Diffusion Electrodes in the CO2 Reduction Reaction

“…To support the above argumentation about the temperature dependence of CO 2 mass transport limitation and to bring it on a more quantitative basis, the current density at which HER starts to increase (j H2 ) was estimated based on the "flooded agglomerate model". [70,71] This model has been chosen because HER sets in if the CO 2 will not reach the center of the flooded agglomerate anymore by diffusion. HER is further increasing as the depletion of CO 2 inside the flooded agglomerate continues to intensify due to increasing current densities.…”

Modeling Oxygen Gas Diffusion Electrodes for Various Technical Applications

“…Besides assuming a cylindrical geometry for the liquid-filled GDE parts, a spherical shape might be used alternatively. Svensson et al [67] set up a dynamic model for the alkaline ORR on Pt in a GDE to derive electrochemical impedance spectra. In their flooded-agglomerate model, catalyst agglomerates are completely filled with the liquid electrolyte and surrounded by gas-filled pores as shown in Fig.…”

“…b) Simulated EIS spectra for two different OHtransference numbers. Reprinted from[67] with permission from Elsevier.…”